Standard Rotation Complete Outdrives 1973-1990
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New, Not Rebuilt! Sterndrive Engineering manufactures and markets new replacement drives with a 3-year Fault Free Manufacturer's Warranty. Ships in 2 boxes. Does not include Complete Install Kit or Anode Kit, which can be ordered separately.
To check for the proper gear ratio for your sterndrive, please reference table below:
| Boat Engine Size | Sterndrive Gear Ratio |
|---|---|
| 350 cubic inch, 5.7 liter, 350 MAG, 5.0 EFI engines | 1.47 ratio, 1.50 ratio |
| Carbureted 305 cubic inch, 5.0 liter carb, 4.3 liter EFI and Inline 6 engines |
1.62 ratio, 1.65 ratio |
| 4.3 liter V-6 engines with carb | 1.81 ratio, 1.84 ratio |
| 3.7 liter and 470, 485 and 488 4-cylinder engines | 1.81 ratio, 1.84 ratio |
| 120, 140, 3.0 liter engines | 1.94 ratio, 1.98 ratio |
Please note that Mercruiser changed their gear ratios somewhat in the mid-1980s (for example a V-8 gear ratio used to be 1.50, but Mercruiser now uses 1.47 ratio.)
Select the outdrive gear ratio based on your engine size.
1.47 or 1.50 Ratio, Replaces Alpha One Gen 1 (1973-1990 model years)
350 cubic inch, 5.7 liter, 350 MAG, 5.0 EFI engines. Comes with a 9-9/16 new style input yoke
147Complete
Our Price: $1,295.00
1.62 or 1.65 Ratio, Replaces Alpha One Gen 1 (1973-1990 model years)
Carbureted 305 cubic inch, 5.0 liter carb, 4.3 liter EFI, and Inline 6 engines. Comes with a 9-9/16 new style input yoke.
162Complete
Our Price: $1,295.00
1.62 or 1.65 Ratio Short Shaft, Replaces Alpha One Gen 1 (1973-1990 model years)
162oldstylecomplete
Carbureted 305 cubic inch, 5.0 liter carb, 4.3 liter EFI and Inline 6 engines. Comes with a 8-1/8 input yoke.
Our Price: $1,295.00
1.81 or 1.84 Ratio, Replaces Alpha One Gen 1 (1973-1990 model years)
4.3 liter V-6 engines with carb, 3.7 liter engines, and 470, 485, & 488 4-cylinder engines. Comes with a 9-9/16 new style input yoke.
181complete
Our Price: $1,295.00
1.81 or 1.84 Ratio Short Staft, Replaces Alpha One Gen 1 (1973-1990 model years)
181oldstylecomplete
4.3 liter V-6 engines with carb, 3.7 liter engines, and 470, 485, & 488 4-cylinder engines. Comes with a 8-1/8 input yoke.
Our Price: $1,295.00
1.94 or 1.98 Ratio, Replaces Alpha One Gen 1 (1973-1990 model years)
120, 140, 3.0 liter Engines. Comes with a 9-9/16 new style input yoke
194complete
Our Price: $1,295.00
1.94 or 1.98 Ratio Short Shaft, Replaces Alpha One Gen 1 (1973-1990 model years)
120, 140, 3.0 liter engines. Comes with a 8-1/8 input yoke.
194oldstylecomplete
Our Price: $1,295.00
Call us toll-free at (866) 969-0441 anytime to place an order or if you have questions. We welcome the opportunity to help find the correct outdrive or any Sterndrive Engine boating part you may need.
Call us toll-free at 866-969-0441 to place an order or for assistance at any time. 
GetBoatGear.com is an authorized dealer for Sterndrive Engineering Marine products. Boating items we currently offer include complete, lower, and upper unit outdrives, outdrive install kits, transom repair parts, shift cables, anode kits, trim cylinders, trim cylinder hoses, and boat propellers. We welcome the opportunity to help find the parts and items you need for your boat.